I just upgraded my carb jet from a 60 to a 70 for my 70cc kit as it was running poorly but now I have the worse problems. I barely go 25 as before i went over 40mph and my throttle gets stuck on full throttle and i have taken the carb apart it seems that the slide gets stucks. The spring is good and i have tried lubing it with MMO but no success. It does not idle for long and stalls it seems like a fuel problem and i checked the breather and for intake leaks any ideas?